A 14-day Correlation-OTDR campaign on four buried fibers in an 8.5-km cable measured up to 800 ps round-trip latency drift and, via a fitted low-pass model, estimated an annual fiber temperature swing of about 25 to 28 K.
Over a period of 14 days in the summer, a maximum round-trip latency variation of 800 ps was measured
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Long-Term Latency Measurement of Deployed Fiber
A 14-day Correlation-OTDR campaign on four buried fibers in an 8.5-km cable measured up to 800 ps round-trip latency drift and, via a fitted low-pass model, estimated an annual fiber temperature swing of about 25 to 28 K.